Synthesis, crystal structure, photoluminescence property of a series of 3d–4f coordination supramolecular complexes.

A series of 3d–4f heterobinuclear complexes were constructed by employing the 2,2′-bipy (2,2′-bipy = 2,2′-bipyridine) ligand and corresponding metal ions (M II /Ln III , M = Co II , Cu II and Zn II ; Ln III = Nd III , Sm III , Eu III and Tb III ). Elemental analyses, IR, UV–vis–NIR spectra, PXRD and single crystal X-ray diffraction analysis reveal that complexes 1 – 4 , 5 – 8 , and 9 – 12 are isomorphous, respectively. The zero-dimensional structures are further connected to 2D or 3D supramolecular network structures via extensive intermolecular hydrogen bonds. Luminescence studies for the heterobinuclear complexes containing Sm III , Eu III and Tb III reveal that the chromophoric composed of Zn II /L may efficiently sensitize the luminescence of the rare earth cations which acts as an antenna, whereas the existence of Cu II leads to the quenching of the luminescence of Ln III ions. [ABSTRACT FROM AUTHOR]